Be More Productive.
Any Device As A Monitor.
Turn your Mac, PC, iOS, Android, or Linux machine into a lightning-fast second screen with ~6ms latency and full KVM support.
Trusted by users in 20+ countries
Built for how you actually work.
From solo coding setups to managed enterprise fleets.
Lightning-fast remote desktop
Use any device as a second display
Create with touch and precision
Give headless machines a real display
Everything you need from an extra display.
No hardware to buy, no drivers to install. Just plug in or connect over WiFi.
No dongles needed
Browser access
Multi-platform
Multi-display
From plug-in to second screen in seconds.
So why not download for free today?
Hardware-accelerated streaming, end to end
SpareDisplay captures, encodes, streams, and renders with hardware acceleration for responsive, low-latency performance that feels native.
Full KVM Support
USB + Wi-Fi
Get started in minutes.
Step-by-step guides to get your first session running.
Behind the build.
Technical deep dives and product updates.
Frequently asked questions
Everything you need to know about SpareDisplay.
What is SpareDisplay?
SpareDisplay is a software-only display extension app that turns any spare screen — Android tablet, iPad, phone, laptop, or Raspberry Pi — into an extra monitor for your Mac, Windows, or Linux machine. No dongles or special hardware required.
How does SpareDisplay compare to Duet Display?
SpareDisplay offers ~6ms latency using hardware-accelerated encoding — faster than Duet Display's typical 16–30ms. SpareDisplay supports 6 platforms (macOS, Windows, Linux, Android, iOS, Raspberry Pi) compared to Duet's 2–3. SpareDisplay also offers a free tier with no time limits.
Can I use SpareDisplay instead of Apple Sidecar?
Yes. Unlike Sidecar, which only works between Apple devices, SpareDisplay works cross-platform — Mac to Android, Windows to iPad, Linux to phone, and any other combination. It also supports USB and WiFi connections with lower latency.
How is SpareDisplay different from Spacedesk?
Spacedesk is Windows-only as a host. SpareDisplay supports Mac, Windows, and Linux as hosts, with full hardware acceleration on all platforms. SpareDisplay also offers enterprise features like MDM, SSO, and fleet management.
Is SpareDisplay free?
Yes, the Starter plan is free forever with 1 client connection, 720p at 30fps, and USB support. Pro plans start at $5/month for up to 4K at 120fps, WiFi, and multi-screen support.
What latency can I expect?
SpareDisplay achieves approximately 6 milliseconds end-to-end latency over USB using hardware-accelerated encoding and decoding. WiFi latency depends on your network but is typically under 16ms on a good connection.
What platforms does SpareDisplay support?
SpareDisplay runs on macOS, Windows, Linux, Android, iOS, and Raspberry Pi. Every app can both share its screen and display a remote one, so any device can be a host or a client.
Can I use my iPad as a second monitor?
Yes. Install SpareDisplay on your iPad and connect it to your Mac, Windows PC, or Linux machine over USB or WiFi. It works with any iPad model and supports full-resolution streaming.
Does SpareDisplay support touch input?
Yes. SpareDisplay includes full KVM (Keyboard, Video, Mouse) support, including touch input from mobile devices and tablets. You can use your device's touchscreen to interact with your computer.
Can I connect multiple screens at once?
Yes. On the Pro plan and above, you can connect up to 3 client devices simultaneously, creating a multi-monitor setup using any combination of supported devices.
Does SpareDisplay work over WiFi?
Yes. SpareDisplay supports both USB and WiFi connections. USB offers the lowest latency (~6ms), while WiFi provides wireless convenience with automatic mDNS discovery on the same network.
Is SpareDisplay suitable for enterprise use?
Yes. SpareDisplay offers Team and Enterprise plans with admin dashboards, SSO, MDM integration (Jamf, Intune), device policies, audit logging, and fleet management for large deployments.